Transfer device and image forming apparatus

    公开(公告)号:US11474459B2

    公开(公告)日:2022-10-18

    申请号:US17370491

    申请日:2021-07-08

    Abstract: A transfer device includes: a transfer member to which a voltage is applied by a power supply device to generate a transfer electric field for transferring a developer image to a recording medium; a transfer cylinder having a recess in which a retaining member that retains a leading end portion of the recording medium is disposed, the transfer electric field being generated between the transfer cylinder and the transfer member at a transfer position; a shunt circuit by which the voltage applied to the transfer member is shunted to a reference potential point; and an operation stopping mechanism that starts and stops an operation of the shunt circuit in response to rotation of the transfer cylinder, the operation being started when the recess reaches the transfer position and stopped when the recess leaves the transfer position.

    IMAGE FORMING APPARATUS
    15.
    发明申请

    公开(公告)号:US20220107592A1

    公开(公告)日:2022-04-07

    申请号:US17320937

    申请日:2021-05-14

    Abstract: An image forming apparatus includes: a rotating body having a recess in an outer peripheral surface thereof; a transfer portion that is in contact with the outer peripheral surface of the rotating body, the transfer portion being configured to transfer a toner to a recording medium passing between the rotating body and the transfer portion; and a brush configured to come into contact with the outer peripheral surface of the rotating body to remove a toner adhering to the outer peripheral surface.

    Image forming apparatus
    16.
    发明授权

    公开(公告)号:US11262675B2

    公开(公告)日:2022-03-01

    申请号:US16290972

    申请日:2019-03-04

    Abstract: An image forming apparatus includes an image holding unit that holds a toner image, a transfer unit that transfers the toner image held by the image holding unit onto a medium in a transfer region, a reduction unit that is positioned further upstream than the transfer region and that reduces an electrical resistance of a first surface of the medium, the first surface being opposite to a second surface of the medium onto which an image is to be transferred, and a control unit that controls the reduction unit in accordance with a type of a medium to be used in such a manner that the electrical resistance of the first surface does not exceed a predetermined range.

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